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# Copyright (c) 2016 Cisco and/or its affiliates.
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Dpdk Utilities Library."""
from resources.libraries.python.ssh import SSH, exec_cmd_no_error
class DpdkUtil(object):
"""Utilities for DPDK."""
@staticmethod
def dpdk_testpmd_start(node, **args):
"""Start DPDK testpmd app on VM node.
:param node: VM Node to start testpmd on.
:param args: List of testpmd parameters.
:type node: dict
:type args: list
:return: nothing
"""
# Set the hexadecimal bitmask of the cores to run on.
eal_coremask = '-c {} '.format(args['eal_coremask'])\
if args.get('eal_coremask', '') else ''
# Set the number of memory channels to use.
eal_mem_channels = '-n {} '.format(args['eal_mem_channels'])\
if args.get('eal_mem_channels', '') else ''
# Set the memory to allocate on specific sockets (comma separated).
eal_socket_mem = '--socket-mem {} '.format(args['eal_socket_mem'])\
if args.get('eal_socket_mem', '') else ''
# Load an external driver. Multiple -d options are allowed.
eal_driver = '-d /usr/lib/librte_pmd_virtio.so '
# Set the forwarding mode: io, mac, mac_retry, mac_swap, flowgen,
# rxonly, txonly, csum, icmpecho, ieee1588
pmd_fwd_mode = '--forward-mode={} '.format(args['pmd_fwd_mode'])\
if args.get('pmd_fwd_mode', '') else ''
# Set the number of packets per burst to N.
pmd_burst = '--burst=64 '
# Set the number of descriptors in the TX rings to N.
pmd_txd = '--txd=2048 '
# Set the number of descriptors in the RX rings to N.
pmd_rxd = '--rxd=2048 '
# Set the hexadecimal bitmask of TX queue flags.
pmd_txqflags = '--txqflags=0xf00 '
# Set the number of mbufs to be allocated in the mbuf pools.
pmd_total_num_mbufs = '--total-num-mbufs=65536 '
# Set the hexadecimal bitmask of the ports for forwarding.
pmd_portmask = '--portmask=0x3 '
# Disable hardware VLAN.
pmd_disable_hw_vlan = '--disable-hw-vlan '\
if args.get('pmd_disable_hw_vlan', '') else ''
# Disable RSS (Receive Side Scaling).
pmd_disable_rss = '--disable-rss '\
if args.get('pmd_disable_rss', '') else ''
# Set the hexadecimal bitmask of the cores running forwarding. Master
# lcore=0 is reserved, so highest bit is set to 0.
pmd_coremask = '--coremask={} '.format(\
hex(int(args['eal_coremask'], 0) & 0xFFFE))\
if args.get('eal_coremask', '') else ''
# Set the number of forwarding cores based on coremask.
pmd_nb_cores = '--nb-cores={} '.format(\
bin(int(args['eal_coremask'], 0) & 0xFFFE).count('1'))\
if args.get('eal_coremask', '') else ''
eal_options = '-v '\
+ eal_coremask\
+ eal_mem_channels\
+ eal_socket_mem\
+ eal_driver
pmd_options = '-- '\
+ pmd_fwd_mode\
+ pmd_burst\
+ pmd_txd\
+ pmd_rxd\
+ pmd_txqflags\
+ pmd_total_num_mbufs\
+ pmd_portmask\
+ pmd_disable_hw_vlan\
+ pmd_disable_rss\
+ pmd_coremask\
+ pmd_nb_cores
ssh = SSH()
ssh.connect(node)
cmd = "/start-testpmd.sh {0} {1}".format(eal_options, pmd_options)
exec_cmd_no_error(node, cmd, sudo=True)
ssh.disconnect(node)
@staticmethod
def dpdk_testpmd_stop(node):
"""Stop DPDK testpmd app on node.
:param node: Node to stop testpmd on.
:type node: dict
:return: nothing
"""
ssh = SSH()
ssh.connect(node)
cmd = "/stop-testpmd.sh"
exec_cmd_no_error(node, cmd, sudo=True)
ssh.disconnect(node)
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